[time-nuts] Quad Driven Mixer 5 to 10 MHz Doubler Article

xaos xaos at darksmile.net
Fri Nov 14 09:52:41 EST 2014


Luciano,

I will put this in OrCAD/CADENCE PSPICE over the weekend
and see what it looks like.

-George

On 11/14/2014 02:53 AM, timeok at timeok.it wrote:
> George,
>
> you can replace the input transformer with the mini-circuits model T2-613-1-KK81 or T662-KK81 for under 2 Dollars. The inductors L1 and L3 are standards value you can find smd or standard  on ebay. About L4 you can put in place a standard 4.7uH value increasing the series capacitor for the 5MHz notching.The 3.18uH is critical because  it has the double function of low pass filter and impedance adapter, so I suggest to made it as described or using a smaller core.
>
> Luciano
>
>
>
>
> On Thu 13/11/14  3:30 PM , xaos <xaos at darksmile.net> wrote:
>
>> Luciano,
>>
>> This looks very nice. However, the inductors are
>> custom made. It would be nice to have a
>> off the shelf parts solution so it can be made
>> easily.
>>
>> Any ideas ?
>>
>> -George, N2FGX
>> On 11/13/2014 08:39 AM, timeok at timeok.it wrote:
>>> Hi all,
>>>
>>> I can suggest a different solution I have tested to have some important
>> improvement. First, the lower phase shift sensitivity with the use of a low
>> pass filter in conjunction with two notch filters instead the high Q band
>> pass filter, second the unity gain to avoid a 13/20 dB amplifier to restore
>> the original power level. You can find in the link all the test we have
>> done.
>>> http://www.timeok.it/files/high_performance_frequency_doublerv13.pdf [1]
>>>
>>> I hope this can hep.
>>>
>>> Luciano
>>> www.timeok.it [2]
>>>
>>>
>>>
>>>
>>> On Thu 13/11/14 10:15 AM , Bert Kehren via time-nuts  wrote:
>>>
>>>> We are using Wenzel with two filters see attached if it will pass. 20
>> Mhz
>>>> is down more than 60 db and 5 MHz 55. Distribution Amp takes care of
>> the
>>>> rest.
>>>> Bert Kehren
>>>>
>>>> In a message dated 11/12/2014 8:13:33 P.M. Eastern Standard Time,
>>>> dgminala at mediacombb.net writes:
>>>>
>>>> Just a few days ago, I ordered parts to build a couple of the Wenzel
>>>> 2-diode
>>>> doublers, described in the same article as your full-wave diode
>> doubler,
>>>> just in time to discover them on Ebay (via slow boat from China), item#
>>>> 171511157159. I inspected the components and layout in the picture in
>> the
>>>> listing, and it certainly looks like the Wenzel FWB doubler. At $9.99
>>>> USD,
>>>> the price is cheap enough, especially since you get SMA connectors on
>> both
>>>> ends. Might have to do a bit of solder work on the SMA connectors if
>> you
>>>> want to put it into a little box.
>>>> The listing on the doubler on Ebay says that the low end is 10MHz, but
>>>> I'll
>>>> bet that it will get down to 5MHz quite easily If there's any trouble
>>>> handling a 5MHz input, you could easily use a lower frequency ferrite
>> for
>>>> the balun and make it work.
>>>> As you suggest, a BPF on the output and maybe a bit of amplification to
>>>> get
>>>> the level up to a usable level should get you a fairly clean 10 MHz.
>>>>
>>>> Dave M
>>>>
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>>>> [1]
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